In "The Eastern Gate" Season 1, Episode 4, airing February 21, 2025, Polish spy Ewa Oginiec intensifies her undercover mission in Kaliningrad. Tasked with safeguarding a vital NATO stronghold, she navigates a treacherous landscape of espionage and deception. As she searches for her missing partner, exposed by Russian intelligence, Ewa aids a key target’s escape while evading capture. The stakes rise as Lange fights to protect his agents, and Tamara digs for answers in Riga. This gripping episode blends suspense and intrigue, unveiling Ewa’s resolve.